Roasting and smelting furnace.



PATENTBD'O. 25, 1.904. H. COGKELL & W. H. FISH.

ROASTING AND SMELTING FURNAGE.

APPLICATION FILED MMM?. 1903. RENEWBD 1411.11.28, 1904.

N0 MODEL.

AKH

ATTORNEYS v No. 772,925.

UNITED STATESl Patented October 25, 1904.

PATENT OFFICE.

ROASTING AND SMELTING FURNACE,

SPECIFICATION forming part of Letters Patent No. 772,925, dated October 25, 1904.

i Applicatiomled March 27, 1903. Renewed March 28, 1904. Serial No. 200,441. (No model.)

To all whom t may concern: Y

Be it known that we, HARVEY COOKELL and WILLIAM H. FISH, citizens of the United States, residing at Columbus, in the county of Franklin and State of Ohio,`have invented certainnew and useful Improvements in Roasting and Smelting Furnaces; and we do hereby declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to Which it ap.- pertains to make and use the same.

'The object of this invention is to provide an improved ore roasting and smelting apparatus in 'which the Work of extracting the .metalis expeditiously and economically effected.

The invention consists in the construction hereinafter described .and claimed whereby the pulverized ore or pulp is simultaneously fed and roasted without subjecting the ore directly to the return blasts from the smelting-furnace.

The invention also embraces details of constructionwherebythe smelting process is expedited and made more nearly perfect.

In the accompanying drawings, Figure l depicts a sectional view of the several parts of the apparatus. Fig. 2 is a sectional view of the furnace on the plane indicated by the line fr, @@Fig 1. Fig. 3 is a section on line y y,

Fig. 1..

In the views, 1 designates the furnace, which has an inclined trough-like bottom l, with a tap 1D to discharge the slag and a tap 1c to discharge the metal. These taps are of course to be plugged during the smelting process.

. Leading into the top of the furnace and pointing toward the bottom and approximately toward the center thereof or toward each other are fuel and ore inlets 2. Connected with these inlets are pipes 3, having a commonstem 3, throughwhich air is supplied. Connected With the pipes 3 are oil or gas pipes 4, having suitable valves 4 for regulating the quantity of oil or gas admitted. Leading out of the top of the furnace -is a flue 5, containing an expanded hood or jacket 5. hood is located an ore feeding and roasting chamber 6, containing a conveyer or screw 7 The chamber 6 is connected With the pipes 3 near the inlet-pipe 3a; but said chamber has In this i no communication with the hood 5a or iiue 5. The shaft of the conveyer or screw is shown -to have gearing by which it' may driven to struction it will be observed that the pulp or ore is roasted in the feeding-chamber by the heated-gases escaping from the furnace without being impeded by them. The air and oil or gas constitute the fuel, and the ore is thoroughly mixed and subjected to intense heat in the smelting-chamber,` which quickly reduces the metallic portions to a-fluid state. The metal is drawn OIT through the lower tap l". The slag lcan of course be first drawn off through the tap 1b. The hood 5a constitutes also a trap to catch` the deposit of fumes from the furnace, and as these oftentimes contain some metal the hood is provided vwith a movable cover 5b to permit access to the interior of the hood for the purpose of removing the deposit and cleaning the same.

Because the fuel-inlets at the top of the furnace are directed toward the bottoml of the furnace and toward each other the heat is intensiiied.

l Additional fuel-burnersin the walls of the furnace can be employed to increase the heat, if deemed necessary. l

, The fuel may be supplied tothe furnace independently of the air-pipes 3, and the vore may be supplied to the furnace by gravity alone and without the aid of the air-blast.

The forms of the parts can be changed without departing from t'ne gist of the invention.

What we claim, and desire to secure by Letters Patent, is-

1. In an ore roasting and smelting. apparatus, a furnace, an outlet for the products of combustion therefrom, an lore feeding and roasting chamber located in said outlet having a separate discharge into said furnace, and a fuel-supply communicating with said discharge.

IOO

2. In an ore roasting and smelting` apparatus,l a furnace, an outlet for the products of combustion therefrom, an ore feeding and roasting chamber located in Said outlet having a Separate discharge into said furnace and an air-inlet communicating with the lastnamed discharge.

3. In an ore roasting and smelting apparatus', a furnace, an outlet for the products of combustion therefrom, an ore feeding and roasting chamber located iusaid outlet having a separate discharge into Said furnace, an air-inlet communicating with the last-named discharge, and a fuel-suppl)v also communieating with said discharge.

In testimony whereof we allix ou r Signatures in presence of two witnesses.

1I AHV EY COCK ELL. IILLlAI 11. F1511. IVitnesses:

GEO. M. FING/1mi., SAMUEL 1V. LA'riiAiI. 

